We had a assembly one day when Mr. Gianforte came to visit our school to teach us more about space and tell us about more discoveries. He came in and started to tell us how scientists discover planets, he told us the have to use a camera that is up in space because are atmosphere makes every thing we see in space blurry, that's why there is a twinkle when you look at a star. So when they get the description of it, they can tell if its a planet or not.